Thrashing-machine



(No Model.) 2 Shets-Sheefn 1.

A. H. WALKER.

THRASHING MACHINE. N0. 3 587. Patented Apr. 2 885 2 Sheets'--Shet 2.

(No Model.)

A. H. WALKER;

THRASHING MACHINE.

Patented Apr. 28, 1885.

N PETERS. Pnnmmho mr. wilihmgion. no

'NITED STATES v PATENT OFFICE? ALBERT H. VALKER, OF EKLO, MARYLAND.

THRASHING-MACHINE' SPECIFICATION forming part of Letters Patent No.316,587, dated April 28, 1885. Application filed June 10, 188. (Nomodel.)

To all whom it may concern.-

Be it known that I, ALBERT H. WALKER, a citizen ofthe United States,residing at .Eklo, in the county of Baltimore and State of Maryland,have invented certain new and useful Improvements inThrashing-lvlachines; and I do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being had to the accompanying drawings, and totheletters and figures of reference marked thereon, which form a part ofthis specification.

This invention relates to thrashing machines.

The invention consists in certain novel constructions and combinationsof parts, which will be described and claimed.

In the drawings, Figure 1 represents a plan view of the machine with theseparating-cylinder and top board removed. Fig. 2 is a longitudinalvertical section of the machine. Fig. 3 is a detail view of theseparating-surface of the cylinder, with sections attached and Fig. 4 isa detached section on line y 3 Fig. 1.

In the accompanying drawings, A is a proper frame for the machine,having journaled transversely across it near its front the main shaft(1, provided with the driving flywheel a on one end and on the otherwith the pulley a B is a cylinder journaled transversely across the topof the frame A, near its front, and a little to the rear of the mainshaft a.

b b are sections of cast-iron or other proper material, fixedlongitudinally to said cylinder, each of which has the crossing setsofinclined grooves 72 b, the grooves in the first set being much morenumerous than those in the other, as shown in Fig. 3. The walls of thegrooves in these sections serve as surfaces by which to force the grainsout of the heads, and the grooves themselves serve to receive the grainsand to prevent their being crushed by the action of the cylinder andconcave. By inclining these grooves in opposite direction, as shown,their walls serve efficiently to force out the grains,while theyproperly lead the grain back to the larger receiving spaces between thesection, as will be seen most clearly in Fig. 8. The cylinder may berevolved by bars cc have their ends fitting into similar 7 oppositerecesses in the upper concave edges of the uprights c c, which are fixedto the sides ofthe frame A at opposite points on the same. The upperedges of the bars 0 0 form a concave slightly below the convex surfaceof the cylinder B and attached sections, and concentric with the same.The said upper edges are crossed by a set of inclined grooves, c, asshown in Fig. 1.

D is a stationary horizontal feedboard fixed to the top of the front endof the frame A, in a plane slightly above that of the center of thecylinder B, and E E are supplementary yielding feed-boards interposedbetween the inner edges and of the board D and the said cylinder. Theboards E E are pivoted to a suitable support-rod, e, fixedin properposition transversely across the frame A. The boards E E stand closelytogether across the frame A, and have their lower edges pushed towardthe cylinder B by spiral springs e e, the rear ends of which are securedto a bar or other proper support fixed transversely across the frame A.When in its usual position, the lower edge of each board E reaches tothe front edge of the concave upper surface of the frame 0, and hasabout the same distance between it and the sections on the cylinder asthere is between the sections and the said concave surface; but shouldany large hard substance attempt to pass between it and the sec=tions 1) b it will give back, its proper spring, 6, being compressed.

F is a proper fanning-mill fixed in the lower part of the frame A, thefan or blower f of which is situated vertically below the cylinder B,and is run by proper pulleys and belt gearing or other means from themain shaft a.

The screen-frame orshaker f of the millis at a suitable distance to therear of the fan, as shown in- Fig. 2.

G is an inclined plane or chute fixed across the frame A between the fanf and the lower edges of the bars a. The said chute inclines backwardand downward, and has its lower end over shaker I, so astoIdischargeupon right angles to its upper surface.

the same,

H is a frame inclining backward and upward from the rear edge of theconcave top of the frame 0, and having its end adjacent thereto formedproperly for the same to deliver on it. able transverse end bars fixedwithin the frame A, and of the longitudinal. bars h h, secured by theirends at right angles to the same. Each bar h is thicker along itscentral longitudinal line than on its edge, its transverse section beingV-shaped, with the point of the V in its upper surface.

it h are-longitudinal reciprocating and vibrating'bar's', each situatedbetween two adjacent bars, h h, and provided at proper points in itslength with teeth or holders h h at The bars h" h are actuated by thecrank-shafts I I, the front one of which has on its journal apulley, t,rotated by a belt from the pulley a on the main shaft, a motion beingcommunicated to the crank-shaft by equal crank-wheels t i and a properconnecting-rod, which wheels and rod are on the opposite side of themachine to that on which is the pulley i.

I I are the cranks on the shafts I I, the

' opposite one on the two shafts corresponding indirection, but everysecond one on each shaft having its direction reversed, so as to make.every second bar h vibrate and reciprocate in opposite directions tothose on each side-of it, A cover-board, J, is provided which may beadjusted to the position shown in "dotted lines, Fig. 2, to serve as achute to carry the straw from the machine when the latter isin use, andto prevent the chaff from the fanning-mill from mixing with the same.When not in use, it may be attached as a cover over the frame H.

K is an inclined plane or chute fixed within the frame A below the frameH, which chute inclines forward and downward from the tail" of theInachine,with its lower end over the shaker ff, so as todischargethereon.

The operation of my machine is as follows: Should any large piece ofstone, wood, or other foreign substance be fed in with the bundles ofunthrashed grain, when it comes between one of the feeding-boards E andthe The frame" H is composed of suitbrating bars h h and attachedholders h h will be carried up said frame and delivered 'to the chute J.Such grain as it still contains, being shaken out of it by the action ofthe bars h h, falls upon the chute K, and is thence delivered to theshaker f. The form of the bars h h is for the purpose of keeping thestraw away from the surface of the bars h it till the holders 71 h cantake well hold of it.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is-

1. A cylinder provided with sections 1), having in their outer orcircumferential faces inclined grooves b and b, the grooves 12 beinginclined in an opposite direction to and made larger than the grooves b,substantially as and for the purposes specified.

2. The combination, in a thrashing-machine, with a straw-carrier and'afan, of the coverboard J, adjustable upon or over the rear end of themachine, whereby it may serve asa top for the machine, and: as a chuteby which to convey the straw and prevent the latter from mixing with thechaff, substantially as set forth.

3. In a thrashing-machine, the combination with the frame A, feed-boardD, and cylinder B, properly journaled in the frame A, and provided withthe sections 1) b, having thesets of grooves b and h of the frame 0,provided with the bars 0 0, having the set of grooves 0 substantially asspecified.

In testimony whereof I affix my signatu-rein 7

